New York tap water by county
Hardness, PFAS sampling, lead and violations for the largest water systems in 8 New York counties. In 5 of them, at least one large system detected PFAS in EPA testing (a detection isn't a violation).
| County | Largest system | Hardness | PFAS detected |
|---|---|---|---|
| Kings County | New York City System | 1.9 gpg (high) | 0 of 1 systems |
| Suffolk County | Suffolk County Water Authority | 0–212 mg/L (varies) (high) | 4 of 6 systems |
| Nassau County | Liberty Utilities New York - Lynbrook | 1.6 gpg (low) | 5 of 6 systems |
| Westchester County | Yonkers City | 6.8 gpg (low) | 1 of 6 systems |
| Erie County | Ecwa Direct | Test (no data) | 0 of 3 systems |
| Monroe County | Rochester City | 88–120 mg/L (varies) (high) | 0 of 4 systems |
| Onondaga County | Ocwa | 115–190 mg/L (varies) (high) | 2 of 6 systems |
| Orange County | Kiryas Joel | 2.2 gpg (low) | 4 of 6 systems |
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
Hardness confidence: high = utility report; low = county estimate of untreated local water. Don't see your county? Use the water quality lookup.